THE BEST SIDE OF BLACKTOP 4AGE

Despite Other folks declare of the 20HP or maybe more increase- on modified heads alone, this is just difficult without camshaft or pistons modified. Toyota has casted and machined all their four valve heads to really shut and accurate tolerances for Road (and rally) use.The 5 valve head is Toyota's bonus on the 4AG after the 4AGZE went away. With